./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash baad12004cda93802c22774fa87dd5ddbc51e76f7e3c81692100acfcfda43c3a --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 05:14:55,655 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 05:14:55,729 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2025-02-06 05:14:55,737 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 05:14:55,738 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 05:14:55,769 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 05:14:55,770 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 05:14:55,770 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 05:14:55,771 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 05:14:55,771 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 05:14:55,771 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 05:14:55,771 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 05:14:55,772 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 05:14:55,772 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 05:14:55,772 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 05:14:55,772 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 05:14:55,772 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 05:14:55,772 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 05:14:55,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 05:14:55,773 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 05:14:55,773 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 05:14:55,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 05:14:55,773 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 05:14:55,773 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 05:14:55,773 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 05:14:55,773 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 05:14:55,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 05:14:55,774 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 05:14:55,774 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 05:14:55,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 05:14:55,774 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 05:14:55,774 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 05:14:55,775 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 05:14:55,775 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 05:14:55,775 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 05:14:55,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 05:14:55,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 05:14:55,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 05:14:55,775 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 05:14:55,775 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 05:14:55,775 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> baad12004cda93802c22774fa87dd5ddbc51e76f7e3c81692100acfcfda43c3a [2025-02-06 05:14:56,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 05:14:56,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 05:14:56,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 05:14:56,100 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 05:14:56,100 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 05:14:56,101 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2025-02-06 05:14:57,474 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/79f3972b7/f5585ebc60eb45ebbafe6c1267c0ae6b/FLAGd1771399d [2025-02-06 05:14:58,055 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 05:14:58,055 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2025-02-06 05:14:58,094 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/79f3972b7/f5585ebc60eb45ebbafe6c1267c0ae6b/FLAGd1771399d [2025-02-06 05:14:58,117 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/79f3972b7/f5585ebc60eb45ebbafe6c1267c0ae6b [2025-02-06 05:14:58,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 05:14:58,121 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 05:14:58,123 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 05:14:58,123 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 05:14:58,127 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 05:14:58,128 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 05:14:58" (1/1) ... [2025-02-06 05:14:58,129 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3f53cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:14:58, skipping insertion in model container [2025-02-06 05:14:58,129 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 05:14:58" (1/1) ... [2025-02-06 05:14:58,219 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 05:14:58,508 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2025-02-06 05:14:58,519 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2025-02-06 05:14:59,218 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,219 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,220 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,221 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,221 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,233 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,233 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,236 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,237 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,238 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,239 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,240 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,240 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,773 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[150650,150663] [2025-02-06 05:14:59,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 05:14:59,808 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 05:14:59,830 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2025-02-06 05:14:59,831 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2025-02-06 05:14:59,886 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,887 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,887 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,888 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,888 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,897 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,898 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,899 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,901 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,902 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,903 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,903 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:14:59,906 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-06 05:15:00,005 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[150650,150663] [2025-02-06 05:15:00,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 05:15:00,168 INFO L204 MainTranslator]: Completed translation [2025-02-06 05:15:00,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:15:00 WrapperNode [2025-02-06 05:15:00,170 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 05:15:00,171 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 05:15:00,171 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 05:15:00,171 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 05:15:00,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:15:00" (1/1) ... [2025-02-06 05:15:00,233 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:15:00" (1/1) ... [2025-02-06 05:15:00,293 INFO L138 Inliner]: procedures = 668, calls = 1043, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 129 [2025-02-06 05:15:00,293 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 05:15:00,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 05:15:00,294 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 05:15:00,294 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 05:15:00,305 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:15:00" (1/1) ... [2025-02-06 05:15:00,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:15:00" (1/1) ... [2025-02-06 05:15:00,311 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:15:00" (1/1) ... [2025-02-06 05:15:00,343 INFO L175 MemorySlicer]: Split 27 memory accesses to 3 slices as follows [2, 5, 20]. 74 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 6 writes are split as follows [0, 0, 6]. [2025-02-06 05:15:00,344 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:15:00" (1/1) ... [2025-02-06 05:15:00,344 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:15:00" (1/1) ... [2025-02-06 05:15:00,363 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:15:00" (1/1) ... [2025-02-06 05:15:00,365 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:15:00" (1/1) ... [2025-02-06 05:15:00,368 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:15:00" (1/1) ... [2025-02-06 05:15:00,370 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:15:00" (1/1) ... [2025-02-06 05:15:00,375 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 05:15:00,376 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 05:15:00,376 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 05:15:00,376 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 05:15:00,377 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:15:00" (1/1) ... [2025-02-06 05:15:00,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 05:15:00,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 05:15:00,430 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 05:15:00,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 05:15:00,452 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_back [2025-02-06 05:15:00,453 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_back [2025-02-06 05:15:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-06 05:15:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-06 05:15:00,453 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-06 05:15:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2025-02-06 05:15:00,453 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2025-02-06 05:15:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 05:15:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2025-02-06 05:15:00,453 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2025-02-06 05:15:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 05:15:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-02-06 05:15:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-02-06 05:15:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-02-06 05:15:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 05:15:00,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 05:15:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2025-02-06 05:15:00,453 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2025-02-06 05:15:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-06 05:15:00,454 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-06 05:15:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-06 05:15:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-02-06 05:15:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-02-06 05:15:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-02-06 05:15:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-02-06 05:15:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-02-06 05:15:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-02-06 05:15:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2025-02-06 05:15:00,454 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2025-02-06 05:15:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2025-02-06 05:15:00,454 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2025-02-06 05:15:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 05:15:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 05:15:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 05:15:00,738 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 05:15:00,741 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 05:15:00,808 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L4729: havoc #t~mem317.base, #t~mem317.offset;havoc #t~short318;havoc #t~mem319.base, #t~mem319.offset;havoc #t~mem320.base, #t~mem320.offset;havoc #t~short321; [2025-02-06 05:15:00,816 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L266: havoc #t~nondet9; [2025-02-06 05:15:00,871 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L4718: havoc #t~mem312.base, #t~mem312.offset;havoc #t~short313;havoc #t~mem314.base, #t~mem314.offset;havoc #t~mem315.base, #t~mem315.offset;havoc #t~short316; [2025-02-06 05:15:01,098 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L4700: havoc #t~ret311#1; [2025-02-06 05:15:01,107 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L4685: havoc #t~mem302.base, #t~mem302.offset; [2025-02-06 05:15:01,154 INFO L? ?]: Removed 60 outVars from TransFormulas that were not future-live. [2025-02-06 05:15:01,155 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 05:15:01,168 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 05:15:01,171 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 05:15:01,172 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 05:15:01 BoogieIcfgContainer [2025-02-06 05:15:01,172 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 05:15:01,174 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 05:15:01,175 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 05:15:01,181 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 05:15:01,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 05:14:58" (1/3) ... [2025-02-06 05:15:01,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fda780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 05:15:01, skipping insertion in model container [2025-02-06 05:15:01,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 05:15:00" (2/3) ... [2025-02-06 05:15:01,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fda780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 05:15:01, skipping insertion in model container [2025-02-06 05:15:01,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 05:15:01" (3/3) ... [2025-02-06 05:15:01,187 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_linked_list_back_harness.i [2025-02-06 05:15:01,203 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 05:15:01,205 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_linked_list_back_harness.i that has 9 procedures, 97 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-06 05:15:01,273 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 05:15:01,291 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@231c91b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 05:15:01,291 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-06 05:15:01,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 64 states have internal predecessors, (80), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2025-02-06 05:15:01,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-02-06 05:15:01,307 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 05:15:01,308 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 05:15:01,309 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 05:15:01,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 05:15:01,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2050953679, now seen corresponding path program 1 times [2025-02-06 05:15:01,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 05:15:01,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981500310] [2025-02-06 05:15:01,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:01,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 05:15:01,507 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 85 statements into 1 equivalence classes. [2025-02-06 05:15:01,534 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 85 of 85 statements. [2025-02-06 05:15:01,534 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:01,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-02-06 05:15:01,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 05:15:01,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981500310] [2025-02-06 05:15:01,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981500310] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 05:15:01,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198307856] [2025-02-06 05:15:01,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:01,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:01,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 05:15:01,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 05:15:01,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 05:15:01,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 85 statements into 1 equivalence classes. [2025-02-06 05:15:02,043 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 85 of 85 statements. [2025-02-06 05:15:02,044 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:02,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:02,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-06 05:15:02,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 05:15:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-02-06 05:15:02,089 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 05:15:02,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198307856] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 05:15:02,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 05:15:02,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-06 05:15:02,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079217956] [2025-02-06 05:15:02,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 05:15:02,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-06 05:15:02,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 05:15:02,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-06 05:15:02,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 05:15:02,126 INFO L87 Difference]: Start difference. First operand has 97 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 64 states have internal predecessors, (80), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-02-06 05:15:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 05:15:02,168 INFO L93 Difference]: Finished difference Result 186 states and 262 transitions. [2025-02-06 05:15:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-06 05:15:02,171 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2025-02-06 05:15:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 05:15:02,179 INFO L225 Difference]: With dead ends: 186 [2025-02-06 05:15:02,180 INFO L226 Difference]: Without dead ends: 92 [2025-02-06 05:15:02,185 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 05:15:02,191 INFO L435 NwaCegarLoop]: 126 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 05:15:02,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 05:15:02,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-02-06 05:15:02,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2025-02-06 05:15:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 60 states have internal predecessors, (74), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2025-02-06 05:15:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2025-02-06 05:15:02,247 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 85 [2025-02-06 05:15:02,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 05:15:02,249 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2025-02-06 05:15:02,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-02-06 05:15:02,250 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2025-02-06 05:15:02,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-02-06 05:15:02,254 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 05:15:02,255 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 05:15:02,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 05:15:02,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-06 05:15:02,461 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 05:15:02,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 05:15:02,462 INFO L85 PathProgramCache]: Analyzing trace with hash -50099217, now seen corresponding path program 1 times [2025-02-06 05:15:02,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 05:15:02,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288113665] [2025-02-06 05:15:02,462 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:02,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 05:15:02,523 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 85 statements into 1 equivalence classes. [2025-02-06 05:15:02,609 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 85 of 85 statements. [2025-02-06 05:15:02,611 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:02,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-02-06 05:15:03,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 05:15:03,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288113665] [2025-02-06 05:15:03,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288113665] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 05:15:03,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516407553] [2025-02-06 05:15:03,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:03,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:03,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 05:15:03,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 05:15:03,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 05:15:03,458 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 85 statements into 1 equivalence classes. [2025-02-06 05:15:03,522 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 85 of 85 statements. [2025-02-06 05:15:03,523 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:03,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:03,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-02-06 05:15:03,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 05:15:03,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2025-02-06 05:15:03,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2025-02-06 05:15:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 44 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-06 05:15:05,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 05:15:18,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 174 [2025-02-06 05:15:18,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:18,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:18,801 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 05:15:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-02-06 05:15:18,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516407553] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 05:15:18,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 05:15:18,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [6, 17] total 34 [2025-02-06 05:15:18,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048658581] [2025-02-06 05:15:18,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 05:15:18,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 05:15:18,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 05:15:18,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 05:15:18,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1012, Unknown=3, NotChecked=0, Total=1122 [2025-02-06 05:15:18,955 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 17 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2025-02-06 05:15:19,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 05:15:19,470 INFO L93 Difference]: Finished difference Result 166 states and 224 transitions. [2025-02-06 05:15:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 05:15:19,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 85 [2025-02-06 05:15:19,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 05:15:19,472 INFO L225 Difference]: With dead ends: 166 [2025-02-06 05:15:19,472 INFO L226 Difference]: Without dead ends: 93 [2025-02-06 05:15:19,476 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=117, Invalid=1140, Unknown=3, NotChecked=0, Total=1260 [2025-02-06 05:15:19,477 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 4 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-06 05:15:19,478 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1053 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-06 05:15:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-02-06 05:15:19,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2025-02-06 05:15:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2025-02-06 05:15:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2025-02-06 05:15:19,498 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 85 [2025-02-06 05:15:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 05:15:19,499 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2025-02-06 05:15:19,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2025-02-06 05:15:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2025-02-06 05:15:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-02-06 05:15:19,505 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 05:15:19,505 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 05:15:19,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 05:15:19,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:19,706 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 05:15:19,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 05:15:19,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1752557228, now seen corresponding path program 1 times [2025-02-06 05:15:19,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 05:15:19,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443058] [2025-02-06 05:15:19,707 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:19,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 05:15:19,735 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 86 statements into 1 equivalence classes. [2025-02-06 05:15:19,817 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 86 of 86 statements. [2025-02-06 05:15:19,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:19,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-02-06 05:15:20,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 05:15:20,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443058] [2025-02-06 05:15:20,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443058] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 05:15:20,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115210812] [2025-02-06 05:15:20,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:20,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:20,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 05:15:20,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 05:15:20,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 05:15:20,334 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 86 statements into 1 equivalence classes. [2025-02-06 05:15:20,395 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 86 of 86 statements. [2025-02-06 05:15:20,395 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:20,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:20,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-02-06 05:15:20,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 05:15:20,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 05:15:20,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2025-02-06 05:15:20,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2025-02-06 05:15:20,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2025-02-06 05:15:20,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2025-02-06 05:15:20,650 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 05:15:20,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 29 [2025-02-06 05:15:20,669 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 05:15:20,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 29 [2025-02-06 05:15:20,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2025-02-06 05:15:20,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2025-02-06 05:15:20,750 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 05:15:20,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 05:15:20,842 INFO L349 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2025-02-06 05:15:20,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 124 treesize of output 126 [2025-02-06 05:15:20,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 102 [2025-02-06 05:15:20,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2025-02-06 05:15:20,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 28 [2025-02-06 05:15:20,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:20,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2025-02-06 05:15:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-02-06 05:15:23,576 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 05:15:23,900 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse2 (+ 16 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|))) (and (forall ((v_ArrVal_243 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_243))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_241 Int) (v_ArrVal_244 (Array Int Int))) (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_244))) (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_241))) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) .cse2) 0)))) is different from false [2025-02-06 05:15:24,012 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 05:15:24,013 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 05:15:24,103 INFO L349 Elim1Store]: treesize reduction 86, result has 45.2 percent of original size [2025-02-06 05:15:24,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 286 [2025-02-06 05:15:24,122 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 05:15:24,123 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 05:15:24,197 INFO L349 Elim1Store]: treesize reduction 86, result has 45.2 percent of original size [2025-02-06 05:15:24,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 365 treesize of output 352 [2025-02-06 05:15:24,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 05:15:24,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 306 treesize of output 302 [2025-02-06 05:15:24,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 243 [2025-02-06 05:15:24,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 05:15:24,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 360 treesize of output 332 [2025-02-06 05:15:24,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 279 [2025-02-06 05:15:24,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2025-02-06 05:15:25,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-02-06 05:15:25,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-02-06 05:15:25,476 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 05:15:25,477 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 05:15:25,492 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 05:15:25,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 282 treesize of output 264 [2025-02-06 05:15:25,811 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 05:15:25,812 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 05:15:25,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 05:15:25,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 248 treesize of output 258 [2025-02-06 05:15:27,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115210812] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 05:15:27,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 05:15:27,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 17 [2025-02-06 05:15:27,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439671524] [2025-02-06 05:15:27,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 05:15:27,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 05:15:27,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 05:15:27,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 05:15:27,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=529, Unknown=2, NotChecked=46, Total=650 [2025-02-06 05:15:27,260 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 17 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-02-06 05:15:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 05:15:29,112 INFO L93 Difference]: Finished difference Result 261 states and 352 transitions. [2025-02-06 05:15:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-06 05:15:29,113 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 86 [2025-02-06 05:15:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 05:15:29,117 INFO L225 Difference]: With dead ends: 261 [2025-02-06 05:15:29,117 INFO L226 Difference]: Without dead ends: 181 [2025-02-06 05:15:29,119 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 131 SyntacticMatches, 15 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=205, Invalid=1519, Unknown=2, NotChecked=80, Total=1806 [2025-02-06 05:15:29,120 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 236 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-02-06 05:15:29,120 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 982 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-02-06 05:15:29,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2025-02-06 05:15:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2025-02-06 05:15:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 115 states have (on average 1.2608695652173914) internal successors, (145), 119 states have internal predecessors, (145), 46 states have call successors, (46), 15 states have call predecessors, (46), 17 states have return successors, (48), 44 states have call predecessors, (48), 44 states have call successors, (48) [2025-02-06 05:15:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 239 transitions. [2025-02-06 05:15:29,150 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 239 transitions. Word has length 86 [2025-02-06 05:15:29,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 05:15:29,151 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 239 transitions. [2025-02-06 05:15:29,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-02-06 05:15:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 239 transitions. [2025-02-06 05:15:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-02-06 05:15:29,152 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 05:15:29,153 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 05:15:29,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 05:15:29,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:29,354 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 05:15:29,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 05:15:29,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1274911528, now seen corresponding path program 1 times [2025-02-06 05:15:29,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 05:15:29,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140733653] [2025-02-06 05:15:29,354 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:29,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 05:15:29,377 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 87 statements into 1 equivalence classes. [2025-02-06 05:15:29,391 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 87 of 87 statements. [2025-02-06 05:15:29,392 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:29,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-02-06 05:15:29,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 05:15:29,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140733653] [2025-02-06 05:15:29,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140733653] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 05:15:29,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909641311] [2025-02-06 05:15:29,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:29,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:29,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 05:15:29,622 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 05:15:29,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 05:15:29,731 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 87 statements into 1 equivalence classes. [2025-02-06 05:15:29,779 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 87 of 87 statements. [2025-02-06 05:15:29,780 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:29,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:29,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 05:15:29,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 05:15:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-06 05:15:29,881 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 05:15:29,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909641311] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 05:15:29,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 05:15:29,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2025-02-06 05:15:29,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521388351] [2025-02-06 05:15:29,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 05:15:29,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 05:15:29,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 05:15:29,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 05:15:29,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2025-02-06 05:15:29,883 INFO L87 Difference]: Start difference. First operand 179 states and 239 transitions. Second operand has 9 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-06 05:15:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 05:15:30,165 INFO L93 Difference]: Finished difference Result 342 states and 457 transitions. [2025-02-06 05:15:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 05:15:30,165 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2025-02-06 05:15:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 05:15:30,168 INFO L225 Difference]: With dead ends: 342 [2025-02-06 05:15:30,168 INFO L226 Difference]: Without dead ends: 183 [2025-02-06 05:15:30,169 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2025-02-06 05:15:30,170 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 132 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 05:15:30,170 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 560 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 05:15:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2025-02-06 05:15:30,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2025-02-06 05:15:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 119 states have internal predecessors, (143), 46 states have call successors, (46), 15 states have call predecessors, (46), 17 states have return successors, (48), 44 states have call predecessors, (48), 44 states have call successors, (48) [2025-02-06 05:15:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 237 transitions. [2025-02-06 05:15:30,213 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 237 transitions. Word has length 87 [2025-02-06 05:15:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 05:15:30,215 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 237 transitions. [2025-02-06 05:15:30,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-06 05:15:30,215 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 237 transitions. [2025-02-06 05:15:30,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2025-02-06 05:15:30,217 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 05:15:30,217 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 05:15:30,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 05:15:30,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:30,421 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 05:15:30,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 05:15:30,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1083723824, now seen corresponding path program 1 times [2025-02-06 05:15:30,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 05:15:30,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113097641] [2025-02-06 05:15:30,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:30,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 05:15:30,442 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 89 statements into 1 equivalence classes. [2025-02-06 05:15:30,451 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 89 of 89 statements. [2025-02-06 05:15:30,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:30,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-02-06 05:15:30,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 05:15:30,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113097641] [2025-02-06 05:15:30,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113097641] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 05:15:30,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26575071] [2025-02-06 05:15:30,732 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:30,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:30,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 05:15:30,735 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 05:15:30,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 05:15:30,852 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 89 statements into 1 equivalence classes. [2025-02-06 05:15:30,902 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 89 of 89 statements. [2025-02-06 05:15:30,903 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:30,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:30,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 05:15:30,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 05:15:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-06 05:15:31,065 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 05:15:31,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26575071] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 05:15:31,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 05:15:31,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2025-02-06 05:15:31,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807183551] [2025-02-06 05:15:31,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 05:15:31,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 05:15:31,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 05:15:31,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 05:15:31,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2025-02-06 05:15:31,068 INFO L87 Difference]: Start difference. First operand 179 states and 237 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-06 05:15:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 05:15:31,453 INFO L93 Difference]: Finished difference Result 354 states and 473 transitions. [2025-02-06 05:15:31,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 05:15:31,453 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 89 [2025-02-06 05:15:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 05:15:31,455 INFO L225 Difference]: With dead ends: 354 [2025-02-06 05:15:31,455 INFO L226 Difference]: Without dead ends: 193 [2025-02-06 05:15:31,458 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2025-02-06 05:15:31,459 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 146 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-06 05:15:31,460 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 623 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-06 05:15:31,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2025-02-06 05:15:31,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 181. [2025-02-06 05:15:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 121 states have internal predecessors, (145), 46 states have call successors, (46), 15 states have call predecessors, (46), 17 states have return successors, (48), 44 states have call predecessors, (48), 44 states have call successors, (48) [2025-02-06 05:15:31,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 239 transitions. [2025-02-06 05:15:31,490 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 239 transitions. Word has length 89 [2025-02-06 05:15:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 05:15:31,490 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 239 transitions. [2025-02-06 05:15:31,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-06 05:15:31,491 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 239 transitions. [2025-02-06 05:15:31,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-02-06 05:15:31,494 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 05:15:31,495 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 05:15:31,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 05:15:31,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:31,695 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 05:15:31,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 05:15:31,696 INFO L85 PathProgramCache]: Analyzing trace with hash 724743938, now seen corresponding path program 1 times [2025-02-06 05:15:31,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 05:15:31,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430814955] [2025-02-06 05:15:31,696 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:31,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 05:15:31,716 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 90 statements into 1 equivalence classes. [2025-02-06 05:15:31,727 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 90 of 90 statements. [2025-02-06 05:15:31,727 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:31,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-02-06 05:15:31,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 05:15:31,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430814955] [2025-02-06 05:15:31,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430814955] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 05:15:31,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328086134] [2025-02-06 05:15:31,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:31,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:31,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 05:15:32,001 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 05:15:32,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 05:15:32,120 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 90 statements into 1 equivalence classes. [2025-02-06 05:15:32,170 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 90 of 90 statements. [2025-02-06 05:15:32,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:32,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:32,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-06 05:15:32,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 05:15:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-02-06 05:15:32,192 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 05:15:32,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328086134] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 05:15:32,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 05:15:32,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2025-02-06 05:15:32,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203044116] [2025-02-06 05:15:32,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 05:15:32,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 05:15:32,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 05:15:32,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 05:15:32,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2025-02-06 05:15:32,194 INFO L87 Difference]: Start difference. First operand 181 states and 239 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2025-02-06 05:15:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 05:15:32,229 INFO L93 Difference]: Finished difference Result 344 states and 463 transitions. [2025-02-06 05:15:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 05:15:32,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 90 [2025-02-06 05:15:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 05:15:32,232 INFO L225 Difference]: With dead ends: 344 [2025-02-06 05:15:32,232 INFO L226 Difference]: Without dead ends: 189 [2025-02-06 05:15:32,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2025-02-06 05:15:32,233 INFO L435 NwaCegarLoop]: 117 mSDtfsCounter, 2 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 05:15:32,233 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 229 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 05:15:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2025-02-06 05:15:32,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 183. [2025-02-06 05:15:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 119 states have (on average 1.2352941176470589) internal successors, (147), 123 states have internal predecessors, (147), 46 states have call successors, (46), 15 states have call predecessors, (46), 17 states have return successors, (48), 44 states have call predecessors, (48), 44 states have call successors, (48) [2025-02-06 05:15:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 241 transitions. [2025-02-06 05:15:32,272 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 241 transitions. Word has length 90 [2025-02-06 05:15:32,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 05:15:32,272 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 241 transitions. [2025-02-06 05:15:32,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2025-02-06 05:15:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 241 transitions. [2025-02-06 05:15:32,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-02-06 05:15:32,274 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 05:15:32,274 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 05:15:32,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 05:15:32,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-06 05:15:32,478 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 05:15:32,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 05:15:32,479 INFO L85 PathProgramCache]: Analyzing trace with hash 335918852, now seen corresponding path program 1 times [2025-02-06 05:15:32,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 05:15:32,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043317313] [2025-02-06 05:15:32,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:32,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 05:15:32,503 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-02-06 05:15:32,520 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-02-06 05:15:32,520 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:32,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2025-02-06 05:15:33,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 05:15:33,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043317313] [2025-02-06 05:15:33,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043317313] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 05:15:33,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604354873] [2025-02-06 05:15:33,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:33,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:33,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 05:15:33,144 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 05:15:33,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 05:15:33,276 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-02-06 05:15:33,328 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-02-06 05:15:33,328 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:33,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:33,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-06 05:15:33,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 05:15:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-06 05:15:33,536 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 05:15:33,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604354873] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 05:15:33,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 05:15:33,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2025-02-06 05:15:33,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259012227] [2025-02-06 05:15:33,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 05:15:33,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 05:15:33,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 05:15:33,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 05:15:33,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2025-02-06 05:15:33,538 INFO L87 Difference]: Start difference. First operand 183 states and 241 transitions. Second operand has 11 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2025-02-06 05:15:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 05:15:33,912 INFO L93 Difference]: Finished difference Result 346 states and 457 transitions. [2025-02-06 05:15:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 05:15:33,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 98 [2025-02-06 05:15:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 05:15:33,915 INFO L225 Difference]: With dead ends: 346 [2025-02-06 05:15:33,917 INFO L226 Difference]: Without dead ends: 189 [2025-02-06 05:15:33,918 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2025-02-06 05:15:33,919 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 110 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 05:15:33,920 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 782 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 05:15:33,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2025-02-06 05:15:33,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2025-02-06 05:15:33,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 125 states have internal predecessors, (149), 46 states have call successors, (46), 15 states have call predecessors, (46), 17 states have return successors, (48), 44 states have call predecessors, (48), 44 states have call successors, (48) [2025-02-06 05:15:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 243 transitions. [2025-02-06 05:15:33,947 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 243 transitions. Word has length 98 [2025-02-06 05:15:33,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 05:15:33,947 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 243 transitions. [2025-02-06 05:15:33,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2025-02-06 05:15:33,948 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 243 transitions. [2025-02-06 05:15:33,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2025-02-06 05:15:33,949 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 05:15:33,949 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 05:15:33,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 05:15:34,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:34,150 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 05:15:34,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 05:15:34,150 INFO L85 PathProgramCache]: Analyzing trace with hash -497988514, now seen corresponding path program 1 times [2025-02-06 05:15:34,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 05:15:34,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655022770] [2025-02-06 05:15:34,151 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:34,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 05:15:34,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 100 statements into 1 equivalence classes. [2025-02-06 05:15:34,182 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 100 of 100 statements. [2025-02-06 05:15:34,182 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:34,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2025-02-06 05:15:34,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 05:15:34,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655022770] [2025-02-06 05:15:34,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655022770] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 05:15:34,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900169796] [2025-02-06 05:15:34,542 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:34,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:34,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 05:15:34,545 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 05:15:34,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 05:15:34,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 100 statements into 1 equivalence classes. [2025-02-06 05:15:34,743 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 100 of 100 statements. [2025-02-06 05:15:34,744 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:34,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:34,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-06 05:15:34,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 05:15:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 05:15:34,836 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 05:15:34,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900169796] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 05:15:34,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 05:15:34,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2025-02-06 05:15:34,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344473846] [2025-02-06 05:15:34,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 05:15:34,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 05:15:34,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 05:15:34,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 05:15:34,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2025-02-06 05:15:34,840 INFO L87 Difference]: Start difference. First operand 185 states and 243 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-06 05:15:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 05:15:34,942 INFO L93 Difference]: Finished difference Result 352 states and 463 transitions. [2025-02-06 05:15:34,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 05:15:34,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 100 [2025-02-06 05:15:34,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 05:15:34,945 INFO L225 Difference]: With dead ends: 352 [2025-02-06 05:15:34,945 INFO L226 Difference]: Without dead ends: 193 [2025-02-06 05:15:34,947 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2025-02-06 05:15:34,948 INFO L435 NwaCegarLoop]: 112 mSDtfsCounter, 1 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 05:15:34,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 758 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 05:15:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2025-02-06 05:15:34,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2025-02-06 05:15:34,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 123 states have (on average 1.2276422764227641) internal successors, (151), 127 states have internal predecessors, (151), 46 states have call successors, (46), 15 states have call predecessors, (46), 17 states have return successors, (48), 44 states have call predecessors, (48), 44 states have call successors, (48) [2025-02-06 05:15:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 245 transitions. [2025-02-06 05:15:34,974 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 245 transitions. Word has length 100 [2025-02-06 05:15:34,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 05:15:34,974 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 245 transitions. [2025-02-06 05:15:34,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-06 05:15:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 245 transitions. [2025-02-06 05:15:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2025-02-06 05:15:34,977 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 05:15:34,978 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 05:15:34,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 05:15:35,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:35,179 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 05:15:35,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 05:15:35,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1063698284, now seen corresponding path program 1 times [2025-02-06 05:15:35,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 05:15:35,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376005] [2025-02-06 05:15:35,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:35,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 05:15:35,201 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 101 statements into 1 equivalence classes. [2025-02-06 05:15:35,212 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 101 of 101 statements. [2025-02-06 05:15:35,212 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:35,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-02-06 05:15:35,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 05:15:35,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376005] [2025-02-06 05:15:35,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376005] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 05:15:35,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682464076] [2025-02-06 05:15:35,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:35,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:35,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 05:15:35,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 05:15:35,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 05:15:35,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 101 statements into 1 equivalence classes. [2025-02-06 05:15:35,836 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 101 of 101 statements. [2025-02-06 05:15:35,836 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:35,836 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:35,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-02-06 05:15:35,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 05:15:35,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 05:15:36,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-06 05:15:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-06 05:15:36,260 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 05:15:36,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 211 [2025-02-06 05:15:36,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2025-02-06 05:15:36,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2025-02-06 05:15:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-02-06 05:15:36,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682464076] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 05:15:36,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 05:15:36,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2025-02-06 05:15:36,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200560733] [2025-02-06 05:15:36,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 05:15:36,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-02-06 05:15:36,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 05:15:36,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-02-06 05:15:36,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1440, Unknown=0, NotChecked=0, Total=1560 [2025-02-06 05:15:36,967 INFO L87 Difference]: Start difference. First operand 187 states and 245 transitions. Second operand has 40 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 34 states have internal predecessors, (132), 13 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (28), 10 states have call predecessors, (28), 13 states have call successors, (28) [2025-02-06 05:15:38,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 05:15:38,327 INFO L93 Difference]: Finished difference Result 430 states and 597 transitions. [2025-02-06 05:15:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-06 05:15:38,328 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 34 states have internal predecessors, (132), 13 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (28), 10 states have call predecessors, (28), 13 states have call successors, (28) Word has length 101 [2025-02-06 05:15:38,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 05:15:38,331 INFO L225 Difference]: With dead ends: 430 [2025-02-06 05:15:38,331 INFO L226 Difference]: Without dead ends: 253 [2025-02-06 05:15:38,333 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=3309, Unknown=0, NotChecked=0, Total=3660 [2025-02-06 05:15:38,333 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 396 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-06 05:15:38,333 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 1613 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-06 05:15:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2025-02-06 05:15:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 201. [2025-02-06 05:15:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 135 states have (on average 1.2518518518518518) internal successors, (169), 139 states have internal predecessors, (169), 46 states have call successors, (46), 15 states have call predecessors, (46), 19 states have return successors, (54), 46 states have call predecessors, (54), 44 states have call successors, (54) [2025-02-06 05:15:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 269 transitions. [2025-02-06 05:15:38,362 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 269 transitions. Word has length 101 [2025-02-06 05:15:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 05:15:38,363 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 269 transitions. [2025-02-06 05:15:38,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 34 states have internal predecessors, (132), 13 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (28), 10 states have call predecessors, (28), 13 states have call successors, (28) [2025-02-06 05:15:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 269 transitions. [2025-02-06 05:15:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2025-02-06 05:15:38,365 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 05:15:38,365 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 05:15:38,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 05:15:38,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:38,566 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 05:15:38,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 05:15:38,567 INFO L85 PathProgramCache]: Analyzing trace with hash -823158155, now seen corresponding path program 1 times [2025-02-06 05:15:38,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 05:15:38,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926845383] [2025-02-06 05:15:38,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:38,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 05:15:38,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 101 statements into 1 equivalence classes. [2025-02-06 05:15:38,616 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 101 of 101 statements. [2025-02-06 05:15:38,617 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:38,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2025-02-06 05:15:39,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 05:15:39,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926845383] [2025-02-06 05:15:39,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926845383] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 05:15:39,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10820167] [2025-02-06 05:15:39,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 05:15:39,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 05:15:39,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 05:15:39,489 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 05:15:39,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 05:15:39,635 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 101 statements into 1 equivalence classes. [2025-02-06 05:15:39,685 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 101 of 101 statements. [2025-02-06 05:15:39,685 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 05:15:39,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 05:15:39,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 95 conjuncts are in the unsatisfiable core [2025-02-06 05:15:39,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 05:15:39,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:39,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2025-02-06 05:15:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:39,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 05:15:39,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2025-02-06 05:15:39,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2025-02-06 05:15:43,852 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_43| Int)) (and (<= (+ 2 (select (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_43|) 24)) |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_43|) (<= 2 |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_43|))) is different from true [2025-02-06 05:15:48,052 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_44| Int)) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_44|) (<= (+ (select (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_44|) 24) 2) |v_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base_BEFORE_CALL_44|))) is different from true [2025-02-06 05:15:52,168 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_24 Int)) (and (<= 2 v_aws_linked_list_back_~list.base_BEFORE_CALL_24) (<= (+ (select (select |c_#memory_$Pointer$#2.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_24) 24) 2) v_aws_linked_list_back_~list.base_BEFORE_CALL_24))) is different from true